The chapter analyzes the main transformations of social stratification that occurred between the beginning of the 2000s and the end of the 2010s. More specifically, It investigates how these transformations are associated with significant changes in the electoral behavior of the various post-Fordist social classes, with particular reference to the vote for left-wing parties. The analysis is divided into two interrelated analytical dimensions. The first one looks at the electoral behavior of the different social groups in the four growth models. The aim is to show if and how the voting propensity of social groups for left-wing parties follows a common trend or if, on the contrary, it is possible to identify specificities across the various models. The second one scrutinizes the changes in the Left parties’ constituencies. To this regard, the chapter investigates the weight of the manual worker class within the left electorate and its change over time, as well as the new configurations of social classes' coalitions supporting the left parties.